I just get a warm feeling when everything comes together, just like the love in this forum.
OK, everybody, big group hug!!!
Seriously, though, why would a horizontal offset of what looks to be less than a foot make the drain "illegal"? On every bathtub you have a similar horizontal offset before the p-trap. On my sister's double kitchen sink, there's a horizontal offset between each of the two drains and the one p-trap. On every washing machine's stand pipe, there's at least a 3 foot vertical offset between the top of the stand pipe and the p-trap?
This web page says that in Wisconsin, the plumbing code allows for a total of 15 inches of combined vertical and horizontal piping between the shower drain and the trap.
The original poster's pictures show that his drain wouldn't be much more than that, so he'd be legal in Wisconsin.
And, the only thing on that web page that gives any reason not to have a horizontal offset between the shower drain and the trap is the statement:
The 15" piece of horizontal pipe before the trap will have a tendency to give off odors. Hair, soap scum, etc can build up , decay, and have a bad smell. Since its before the trap theres no water seal to prevent this.
But, if memory serves, you have about 15 inches of empty pipe before every bathtub p-trap in the world that, by rights, should also "have a tendency to give off odors", and yet it's never been a problem. I have 21 bathtubs, and NONE of them give off offensive odors or I couldn't rent my suites. So, why would a shower be any worse in that regard than a bathtub?
And, let's not put this post in the bag marked "If you're telling people not to follow their building codes, you're putting their lives at risk and you otta be shot". There has to be some sober reasoning behind the plumbing code, but it seems to be treating showers different than bathtubs, even though lots of bathtubs are used as showers. So, why are short horizontal offsets perfectly fine on bathtubs and double kitchen sinks but if you go a little longer on a shower drain, it's apparantly so dangerous as to be "illegal".
Can anyone explain, cuz I sure as he11 can't.